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Preparing for the Visit to a Deciduous Forest
One of the field experiments you will carry out is to take readings of the temperature, sunlight and humidity in different areas, using a compass to determine your direction.
It is always a good idea to make a note of the weather on the day that you take your readings.
You should choose five different areas in school grounds (see map at the bottom of this page). At each of these positions use a compass to find North and place an arrow on your map to indicate its direction.
The red pointer is magnetic and is pointing to the North. You should turn the compass until the large, blue arrow is beneath the red pointer.
You now know the North direction which allows you to calculate South, West and East.
At each of these five positions you should also measure and record the temperature, the light reading and the humidity.
To practise using a centigrade thermometer to measure the air
temperature, take and record the temperature the five different areas you visit around the school.
The Light meter
Hold the light
metre so that the light sensitive cell is pointing upward.
Take the reading indicated by the pointer on the lower,
Gently wave the hygrometer in the air and record the percentage humidity.
(Note that you should not use the hygrometer when it is raining).